[....] Starting enhanced syslogd: rsyslogd[?25l[?1c7[ ok 8[?25h[?0c. [ 104.472149][ T31] audit: type=1800 audit(1565028165.531:25): pid=11868 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="cron" dev="sda1" ino=2414 res=0 [ 104.496934][ T31] audit: type=1800 audit(1565028165.561:26): pid=11868 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="mcstrans" dev="sda1" ino=2457 res=0 [ 104.537104][ T31] audit: type=1800 audit(1565028165.581:27): pid=11868 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="restorecond" dev="sda1" ino=2436 res=0 [....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[?25l[?1c7[ ok 8[?25h[?0c. Debian GNU/Linux 7 syzkaller ttyS0 Warning: Permanently added '10.128.10.28' (ECDSA) to the list of known hosts. 2019/08/05 18:03:00 fuzzer started syzkaller login: [ 123.872363][T12026] as (12026) used greatest stack depth: 52064 bytes left 2019/08/05 18:03:06 dialing manager at 10.128.0.26:46627 2019/08/05 18:03:06 syscalls: 2367 2019/08/05 18:03:06 code coverage: enabled 2019/08/05 18:03:06 comparison tracing: CONFIG_KCOV_ENABLE_COMPARISONS is not enabled 2019/08/05 18:03:06 extra coverage: enabled 2019/08/05 18:03:06 setuid sandbox: enabled 2019/08/05 18:03:06 namespace sandbox: enabled 2019/08/05 18:03:06 Android sandbox: /sys/fs/selinux/policy does not exist 2019/08/05 18:03:06 fault injection: enabled 2019/08/05 18:03:06 leak checking: CONFIG_DEBUG_KMEMLEAK is not enabled 2019/08/05 18:03:06 net packet injection: enabled 2019/08/05 18:03:06 net device setup: enabled [ 197.520474][ C0] ================================================================== [ 197.528605][ C0] BUG: KMSAN: uninit-value in kmem_cache_alloc_node+0x5d0/0xe70 [ 197.536261][ C0] CPU: 0 PID: 12029 Comm: syz-fuzzer Not tainted 5.3.0-rc3+ #16 [ 197.543905][ C0] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 197.553978][ C0] Call Trace: [ 197.557285][ C0] [ 197.560167][ C0] dump_stack+0x191/0x1f0 [ 197.564532][ C0] kmsan_report+0x162/0x2d0 [ 197.569078][ C0] __msan_warning+0x75/0xe0 [ 197.573711][ C0] kmem_cache_alloc_node+0x5d0/0xe70 [ 197.578993][ C0] ? __alloc_skb+0x215/0xa10 [ 197.583601][ C0] __alloc_skb+0x215/0xa10 [ 197.588078][ C0] aoecmd_cfg+0x205/0xa80 [ 197.592431][ C0] discover_timer+0x86/0xa0 [ 197.597015][ C0] call_timer_fn+0x232/0x530 [ 197.601595][ C0] ? skbfree+0x4a0/0x4a0 [ 197.605835][ C0] __run_timers+0xcdc/0x11a0 [ 197.610439][ C0] ? __msan_metadata_ptr_for_load_8+0x10/0x20 [ 197.616585][ C0] ? skbfree+0x4a0/0x4a0 [ 197.620833][ C0] ? kmsan_get_shadow_origin_ptr+0x28c/0x3a0 [ 197.626806][ C0] run_timer_softirq+0x2d/0x50 [ 197.631568][ C0] ? timers_dead_cpu+0x9d0/0x9d0 [ 197.636501][ C0] __do_softirq+0x4a1/0x83a [ 197.641008][ C0] do_softirq_own_stack+0x49/0x80 [ 197.646017][ C0] [ 197.648949][ C0] __local_bh_enable_ip+0x184/0x1d0 [ 197.654147][ C0] local_bh_enable+0x36/0x40 [ 197.658828][ C0] ip_finish_output2+0x20dc/0x25d0 [ 197.663935][ C0] ? __msan_metadata_ptr_for_load_2+0x10/0x20 [ 197.670011][ C0] ? nf_ct_deliver_cached_events+0x4d5/0x6e0 [ 197.676008][ C0] __ip_finish_output+0xaf8/0xda0 [ 197.681037][ C0] ip_finish_output+0x2db/0x420 [ 197.685985][ C0] ip_output+0x541/0x610 [ 197.690339][ C0] ? ip_mc_finish_output+0x6d0/0x6d0 [ 197.695617][ C0] ? ip_finish_output+0x420/0x420 [ 197.700638][ C0] __ip_queue_xmit+0x1caf/0x21f0 [ 197.705571][ C0] ? kmsan_get_shadow_origin_ptr+0x28c/0x3a0 [ 197.711543][ C0] ? __msan_metadata_ptr_for_load_8+0x10/0x20 [ 197.717606][ C0] ? __msan_metadata_ptr_for_load_8+0x10/0x20 [ 197.724130][ C0] ip_queue_xmit+0xcc/0xf0 [ 197.728545][ C0] ? tcp_v4_inbound_md5_hash+0xd10/0xd10 [ 197.734286][ C0] __tcp_transmit_skb+0x409e/0x5c60 [ 197.739522][ C0] __tcp_send_ack+0x701/0x840 [ 197.744200][ C0] tcp_send_ack+0x68/0x90 [ 197.748794][ C0] tcp_cleanup_rbuf+0x764/0x800 [ 197.753645][ C0] tcp_recvmsg+0x334d/0x4ff0 [ 197.758363][ C0] ? kmsan_get_shadow_origin_ptr+0x28c/0x3a0 [ 197.764351][ C0] ? tcp_mmap+0x150/0x150 [ 197.768692][ C0] ? tcp_mmap+0x150/0x150 [ 197.773006][ C0] inet_recvmsg+0x237/0x7d0 [ 197.777503][ C0] ? inet_sendpage+0x2c0/0x2c0 [ 197.782256][ C0] ? kmsan_get_shadow_origin_ptr+0x28c/0x3a0 [ 197.788224][ C0] ? inet_sendpage+0x2c0/0x2c0 [ 197.792975][ C0] ? inet_sendpage+0x2c0/0x2c0 [ 197.797730][ C0] sock_read_iter+0x5be/0x660 [ 197.802414][ C0] ? kernel_sock_ip_overhead+0x340/0x340 [ 197.808044][ C0] __vfs_read+0xa67/0xc90 [ 197.812388][ C0] vfs_read+0x359/0x6f0 [ 197.816686][ C0] ksys_read+0x265/0x430 [ 197.820940][ C0] __se_sys_read+0x92/0xb0 [ 197.825369][ C0] __x64_sys_read+0x4a/0x70 [ 197.829871][ C0] do_syscall_64+0xbc/0xf0 [ 197.834282][ C0] entry_SYSCALL_64_after_hwframe+0x63/0xe7 [ 197.840176][ C0] RIP: 0033:0x47fcb4 [ 197.844067][ C0] Code: ff ff cc cc cc cc e8 2b 41 fb ff 48 8b 7c 24 10 48 8b 74 24 18 48 8b 54 24 20 45 31 d2 45 31 c0 45 31 c9 48 8b 44 24 08 0f 05 <48> 3d 01 f0 ff ff 76 20 48 c7 44 24 28 ff ff ff ff 48 c7 44 24 30 [ 197.864206][ C0] RSP: 002b:000000c4202c3710 EFLAGS: 00000246 ORIG_RAX: 0000000000000000 [ 197.872623][ C0] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 000000000047fcb4 [ 197.881061][ C0] RDX: 0000000000001000 RSI: 000000c4202da000 RDI: 0000000000000003 [ 197.889781][ C0] RBP: 000000c4202c3760 R08: 0000000000000000 R09: 0000000000000000 [ 197.898639][ C0] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000010 [ 197.906699][ C0] R13: 0000000000000010 R14: 0000000000000004 R15: ffffffffffffffff [ 197.914831][ C0] [ 197.917250][ C0] Uninit was stored to memory at: [ 197.922306][ C0] kmsan_internal_chain_origin+0xcc/0x150 [ 197.929207][ C0] __msan_chain_origin+0x6b/0xe0 [ 197.935221][ C0] ___slab_alloc+0x1dbc/0x1fb0 [ 197.942319][ C0] kmem_cache_alloc_node+0x769/0xe70 [ 197.947952][ C0] __alloc_skb+0x215/0xa10 [ 197.952364][ C0] aoecmd_cfg+0x205/0xa80 [ 197.956712][ C0] discover_timer+0x86/0xa0 [ 197.962068][ C0] call_timer_fn+0x232/0x530 [ 197.966759][ C0] __run_timers+0xcdc/0x11a0 [ 197.971450][ C0] run_timer_softirq+0x2d/0x50 [ 197.976212][ C0] __do_softirq+0x4a1/0x83a [ 197.980703][ C0] do_softirq_own_stack+0x49/0x80 [ 197.985744][ C0] __local_bh_enable_ip+0x184/0x1d0 [ 197.990960][ C0] local_bh_enable+0x36/0x40 [ 197.995636][ C0] ip_finish_output2+0x20dc/0x25d0 [ 198.000785][ C0] __ip_finish_output+0xaf8/0xda0 [ 198.005799][ C0] ip_finish_output+0x2db/0x420 [ 198.010725][ C0] ip_output+0x541/0x610 [ 198.015052][ C0] __ip_queue_xmit+0x1caf/0x21f0 [ 198.020185][ C0] ip_queue_xmit+0xcc/0xf0 [ 198.024686][ C0] __tcp_transmit_skb+0x409e/0x5c60 [ 198.029895][ C0] __tcp_send_ack+0x701/0x840 [ 198.034589][ C0] tcp_send_ack+0x68/0x90 [ 198.038964][ C0] tcp_cleanup_rbuf+0x764/0x800 [ 198.043806][ C0] tcp_recvmsg+0x334d/0x4ff0 [ 198.048386][ C0] inet_recvmsg+0x237/0x7d0 [ 198.052895][ C0] sock_read_iter+0x5be/0x660 [ 198.057573][ C0] __vfs_read+0xa67/0xc90 [ 198.061995][ C0] vfs_read+0x359/0x6f0 [ 198.066410][ C0] ksys_read+0x265/0x430 [ 198.070774][ C0] __se_sys_read+0x92/0xb0 [ 198.075195][ C0] __x64_sys_read+0x4a/0x70 [ 198.079800][ C0] do_syscall_64+0xbc/0xf0 [ 198.084229][ C0] entry_SYSCALL_64_after_hwframe+0x63/0xe7 [ 198.090123][ C0] [ 198.092456][ C0] Uninit was created at: [ 198.096697][ C0] kmsan_internal_poison_shadow+0x53/0xa0 [ 198.102439][ C0] kmsan_slab_free+0x8d/0x100 [ 198.107116][ C0] kmem_cache_free_bulk+0x3ad9/0x3f50 [ 198.112483][ C0] __kfree_skb_flush+0xb0/0x100 [ 198.117336][ C0] net_rx_action+0x1908/0x1950 [ 198.122088][ C0] __do_softirq+0x4a1/0x83a [ 198.126577][ C0] irq_exit+0x230/0x280 [ 198.130724][ C0] do_IRQ+0x20d/0x3a0 [ 198.134690][ C0] ret_from_intr+0x0/0x33 [ 198.139005][ C0] kmsan_get_shadow_origin_ptr+0x57/0x3a0 [ 198.144720][ C0] __msan_metadata_ptr_for_load_8+0x10/0x20 [ 198.150603][ C0] change_protection+0x2038/0x2b40 [ 198.155701][ C0] change_prot_numa+0xb6/0x150 [ 198.160694][ C0] task_numa_work+0x8f5/0x1270 [ 198.165449][ C0] task_work_run+0x22e/0x2a0 [ 198.170277][ C0] prepare_exit_to_usermode+0x39d/0x4d0 [ 198.176028][ C0] syscall_return_slowpath+0x90/0x610 [ 198.182424][ C0] do_syscall_64+0xe2/0xf0 [ 198.186842][ C0] entry_SYSCALL_64_after_hwframe+0x63/0xe7 [ 198.194781][ C0] ================================================================== [ 198.203125][ C0] Disabling lock debugging due to kernel taint [ 198.209290][ C0] Kernel panic - not syncing: panic_on_warn set ... [ 198.215869][ C0] CPU: 0 PID: 12029 Comm: syz-fuzzer Tainted: G B 5.3.0-rc3+ #16 [ 198.225095][ C0] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 198.235151][ C0] Call Trace: [ 198.238643][ C0] [ 198.241506][ C0] dump_stack+0x191/0x1f0 [ 198.245953][ C0] panic+0x3c9/0xc1e [ 198.250076][ C0] kmsan_report+0x2ca/0x2d0 [ 198.254874][ C0] __msan_warning+0x75/0xe0 [ 198.259477][ C0] kmem_cache_alloc_node+0x5d0/0xe70 [ 198.264771][ C0] ? __alloc_skb+0x215/0xa10 [ 198.269377][ C0] __alloc_skb+0x215/0xa10 [ 198.273810][ C0] aoecmd_cfg+0x205/0xa80 [ 198.278350][ C0] discover_timer+0x86/0xa0 [ 198.283221][ C0] call_timer_fn+0x232/0x530 [ 198.287849][ C0] ? skbfree+0x4a0/0x4a0 [ 198.292112][ C0] __run_timers+0xcdc/0x11a0 [ 198.297298][ C0] ? __msan_metadata_ptr_for_load_8+0x10/0x20 [ 198.303370][ C0] ? skbfree+0x4a0/0x4a0 [ 198.307636][ C0] ? kmsan_get_shadow_origin_ptr+0x28c/0x3a0 [ 198.315296][ C0] run_timer_softirq+0x2d/0x50 [ 198.320219][ C0] ? timers_dead_cpu+0x9d0/0x9d0 [ 198.325165][ C0] __do_softirq+0x4a1/0x83a [ 198.329824][ C0] do_softirq_own_stack+0x49/0x80 [ 198.336094][ C0] [ 198.339044][ C0] __local_bh_enable_ip+0x184/0x1d0 [ 198.344546][ C0] local_bh_enable+0x36/0x40 [ 198.349149][ C0] ip_finish_output2+0x20dc/0x25d0 [ 198.354644][ C0] ? __msan_metadata_ptr_for_load_2+0x10/0x20 [ 198.360794][ C0] ? nf_ct_deliver_cached_events+0x4d5/0x6e0 [ 198.366805][ C0] __ip_finish_output+0xaf8/0xda0 [ 198.372140][ C0] ip_finish_output+0x2db/0x420 [ 198.377048][ C0] ip_output+0x541/0x610 [ 198.381326][ C0] ? ip_mc_finish_output+0x6d0/0x6d0 [ 198.386628][ C0] ? ip_finish_output+0x420/0x420 [ 198.391672][ C0] __ip_queue_xmit+0x1caf/0x21f0 [ 198.396736][ C0] ? kmsan_get_shadow_origin_ptr+0x28c/0x3a0 [ 198.402876][ C0] ? __msan_metadata_ptr_for_load_8+0x10/0x20 [ 198.408973][ C0] ? __msan_metadata_ptr_for_load_8+0x10/0x20 [ 198.415088][ C0] ip_queue_xmit+0xcc/0xf0 [ 198.419529][ C0] ? tcp_v4_inbound_md5_hash+0xd10/0xd10 [ 198.425174][ C0] __tcp_transmit_skb+0x409e/0x5c60 [ 198.430413][ C0] __tcp_send_ack+0x701/0x840 [ 198.435284][ C0] tcp_send_ack+0x68/0x90 [ 198.439710][ C0] tcp_cleanup_rbuf+0x764/0x800 [ 198.445735][ C0] tcp_recvmsg+0x334d/0x4ff0 [ 198.450965][ C0] ? kmsan_get_shadow_origin_ptr+0x28c/0x3a0 [ 198.457056][ C0] ? tcp_mmap+0x150/0x150 [ 198.461571][ C0] ? tcp_mmap+0x150/0x150 [ 198.465917][ C0] inet_recvmsg+0x237/0x7d0 [ 198.470434][ C0] ? inet_sendpage+0x2c0/0x2c0 [ 198.475195][ C0] ? kmsan_get_shadow_origin_ptr+0x28c/0x3a0 [ 198.481444][ C0] ? inet_sendpage+0x2c0/0x2c0 [ 198.486202][ C0] ? inet_sendpage+0x2c0/0x2c0 [ 198.491138][ C0] sock_read_iter+0x5be/0x660 [ 198.495845][ C0] ? kernel_sock_ip_overhead+0x340/0x340 [ 198.501469][ C0] __vfs_read+0xa67/0xc90 [ 198.505814][ C0] vfs_read+0x359/0x6f0 [ 198.509982][ C0] ksys_read+0x265/0x430 [ 198.514250][ C0] __se_sys_read+0x92/0xb0 [ 198.518667][ C0] __x64_sys_read+0x4a/0x70 [ 198.523165][ C0] do_syscall_64+0xbc/0xf0 [ 198.527578][ C0] entry_SYSCALL_64_after_hwframe+0x63/0xe7 [ 198.533459][ C0] RIP: 0033:0x47fcb4 [ 198.537346][ C0] Code: ff ff cc cc cc cc e8 2b 41 fb ff 48 8b 7c 24 10 48 8b 74 24 18 48 8b 54 24 20 45 31 d2 45 31 c0 45 31 c9 48 8b 44 24 08 0f 05 <48> 3d 01 f0 ff ff 76 20 48 c7 44 24 28 ff ff ff ff 48 c7 44 24 30 [ 198.556951][ C0] RSP: 002b:000000c4202c3710 EFLAGS: 00000246 ORIG_RAX: 0000000000000000 [ 198.565517][ C0] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 000000000047fcb4 [ 198.573504][ C0] RDX: 0000000000001000 RSI: 000000c4202da000 RDI: 0000000000000003 [ 198.581748][ C0] RBP: 000000c4202c3760 R08: 0000000000000000 R09: 0000000000000000 [ 198.590337][ C0] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000010 [ 198.598304][ C0] R13: 0000000000000010 R14: 0000000000000004 R15: ffffffffffffffff [ 198.607304][ C0] Kernel Offset: disabled [ 198.611660][ C0] Rebooting in 86400 seconds..